CN101579756B - Work implement - Google Patents
Work implement Download PDFInfo
- Publication number
- CN101579756B CN101579756B CN200910139089.9A CN200910139089A CN101579756B CN 101579756 B CN101579756 B CN 101579756B CN 200910139089 A CN200910139089 A CN 200910139089A CN 101579756 B CN101579756 B CN 101579756B
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- China
- Prior art keywords
- clamping device
- work implement
- belt
- eccentric cam
- bracket
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
- B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
Abstract
The present invention relates to work implement, comprise the instrument driven by CD-ROM drive motor (15), this instrument is driven by belt (21).Belt (21) is guided by driving-disc (20) and clutch plate (22).Be provided with clamping device (40,60,70,80), the distance between driving-disc (20) and clutch plate (22) can be changed by this clamping device.Clamping device (40,60,70,80) has at least one clamped position (38) and at least one released position (39).Belt (21) is elastic belt and this clamping device (40,60,70,80) because the effect of the tensile force of elastic belt (21) is maintained on clamped position (38), obtain clamping device (40 thus, 60,70,80) the simple structure of one.
Description
Technical field
The present invention relates to a kind of work implement.
Background technology
DE3841644C2 discloses a kind of work implement with the bracket that is made up of two parts.A clamping device acts between two portion's sections of bracket, and this clamping device remains on its final position by compression spring, namely on a position out of service and a run location.
Summary of the invention
Task of the present invention is to provide a kind of such work implement, and its clamping device has simple structure.
This task is solved by a kind of work implement, this work implement comprises the instrument by drive motor, this instrument passes through belt drives, belt is guided by driving-disc and clutch plate, wherein be provided with the clamping device for this belt, the distance between driving-disc and clutch plate can be changed by this clamping device, wherein clamping device has at least one clamped position and at least one released position, wherein driving-disc and clutch plate have the first Distance geometry each other on released position, have less second distance on clamped position, this belt is elastic belt and this clamping device because the effect of the tensile force of elastic belt is maintained on clamped position.
There will be a known so-called elastic belt, this elastic belt has high internal stress and keeps this internal stress at their life period.This elastic belt to be such as applied in automotive field and need not to be strained again.But the installation of elastic belt is more bothersome, because belt must be expanded under the internal stress overcoming it when installing.
By using elastic belt in combination with the clamping device with a clamped position and a released position, simple installation and removal can be realized on the one hand, clamping device the structure of clamping device can be simplified on the other hand, because can remain on clamped position by elastic belt itself.The additional spring remained on by clamping device on its clamped position can be cancelled thus.Realize the simple and light structure of clamping device thus.Belt can be installed simply not spending under large power in released position.
Advantageously instrument is arranged on a bracket.Especially at least one section of bracket is arranged with longitudinal movement relative to the shell of work implement, on shell, wherein arranges driving-disc and arrange clutch plate in portion's section of bracket.Now can specify, whole bracket is arranged with longitudinal movement relative to the shell of work implement.But also can advantageously, two, bracket partly construct and bracket its on portion's section of placement tool arrange with longitudinal movement relative to second section of bracket fixing on shell.
Advantageously, clamping device has a clamping element, and this clamping element is applied on a pressure elements, and one wherein in these two elements of clamping element and pressure elements to be connected with shell and another is connected with mobilizable bracket part section.
When clamping element is configured to the eccentric cam installed prejudicially and rotatably, then obtain a kind of simple structural design.The different distance of driving-disc and clutch plate can be realized in a straightforward manner by eccentric cam.Advantageously eccentric cam is arranged on the pin of the clamping device of clamping device, and wherein pin is configured to fixing pin.In order to be locked on clamped position by the position of bracket relative to shell, it can be favourable for arranging clamping device.By being arranged on by eccentric cam on the fixing pin of clamping device, the additional pin for supporting eccentric cam can be cancelled.The number of components needed and the weight of clamping device are reduced.But also can specify, eccentric cam be arranged on be fixedly connected with shell to support on the pin of pin formal construction.Supporting pin now such as can be twisted and is connected in shell.The fixing pin of clamping device and the supporting pin of eccentric cam are separated parts thus.
In order to limit the position location of clamping device, regulation eccentric cam has at least one recess, and on a position of clamping element, pressure elements leans in this recess.This recess, it is advantageously configured in eccentric cam circumferentially, defines position location in a straightforward manner.The power for regulating clamping element can be regulated by the degree of depth of recess.In order to determine the direction of rotation that clamping element can be turned on position location or rotate out from position location, additionally especially backstop can be set on the edge of recess, at this backstop place, the distance between the circumference of eccentric cam and the rotating shaft of eccentric cam increases.The rotational motion of backstop restriction eccentric cam thus.Multiple clamped position can be set, so as to realize different belt tensions or from different belt match parameters, they such as can be formed by the multiple recesses circumferentially of eccentric cam.
Advantageously, eccentric cam is applied on pressure elements by push rod, and wherein this push rod guides with longitudinal movement in guiding mechanism.Can the position of clamping element and pressure elements be adjusted for the installation situation of work implement and the structure space provided is provided well thus.
Advantageously, clamping element is applied on pressure elements by control stick, and wherein this control stick is connected with pressure elements at first end and is connected with clamping element at the second end.Suitably, control stick is install pivotly on two end.In order to limit the final position of clamping device, on the first side that the second end of regulation control stick is arranged in the line between the first end of control stick and the rotating shaft of clamping element on clamped position and be arranged on released position on the second relative side of line.If the second end of control stick is arranged on line, so produce the maximum power acted on clamping device.From this centre position, on the side that regulating element arrives line due to the effect of the tensile force of belt or another side.Advantageously, arrange and be used for clamping element backstop, lean when clamping element is on clamped position in this backstop.A kind of simple structural design is then obtained when the accommodation section that clamping device is arranged in bracket neutralizes when this backstop is formed by the wall of this accommodation section.
In order to realize arranging clamping device with saving position, clamping device is arranged in an accommodation section in the strap lug of belt by regulation.
Suitably, clamping device has regulating element, and this regulating element is with the formal construction of rotatable adjusting knob.Adjusting knob can by operator outside bracket with hand or with suitable tool control.Advantageously, adjusting knob is additionally provided with mark, this mark indicates, and whether clamping device is arranged on clamped position or on released position.In order to realize little number of components, regulation clamping element is configured on adjusting knob.
Suitably, work implement has clamping device, and mobile stool portion section locks relative to shell by this clamping device.Clamping device now advantageously has at least one, suitably, and multiple pin be respectively arranged in an elongated hole.Pin can be now screw and in being screwed on shell screw thread or bolt, and nut that it can be screwed on, is clamped on shell regularly to make bracket.
Accompanying drawing explanation
Embodiments of the invention will be described according to accompanying drawing.Shown in accompanying drawing:
Fig. 1 is a side view of cutting machine,
Fig. 2 is a schematic cross-sectional view of the shell of cutting machine by Fig. 1,
Fig. 3 is the diagrammatic side view of clamping device on clamped position for the cutting machine of Fig. 1,
Fig. 4 is the view of clamping device on released position of Fig. 3,
Fig. 5 is the diagrammatic side view of an embodiment of the eccentric cam of the clamping device on clamped position for Fig. 3,
Fig. 6 is the view of eccentric cam on released position of Fig. 5,
Fig. 7 is the diagrammatic side view of the embodiment of an eccentric cam on clamped position,
Fig. 8 is the view of eccentric cam on released position of Fig. 7,
Fig. 9 is the side view of the embodiment of a clamping device on clamped position,
Figure 10 is the view of clamping device on released position of Fig. 9,
Figure 11 is the side view of a clamping device on clamped position,
Figure 12 is the view of clamping device on released position of Figure 11,
Figure 13 is the side view of a clamping device on a centre position,
Figure 14 is the view of clamping device on released position of Figure 13.
Detailed description of the invention
Embodiment in FIG as a kind of work implement shows a kind of manual control, portable work implement, i.e. cutting machine 1.Work implement also can be such as a kind of powered weeding machine or other work implement a kind of, and it has the instrument by belt drives.Cutting machine 1 has shell 2, and handle 3 and handle that shell is furnished with rear portion hold a writing brush or pen-write 4.The starting handle 5 of the starting device of cutting machine 1 stretches out from shell 2.Cutting machine 1 has bracket 7, and this bracket is arranged with longitudinal movement relative to shell 2.Bracket 7 covers in cover plate 8 in the region of shell 2.In the region of cover plate 8, knob 9 protrudes laterally.Bracket 7 can be fixed relative to shell 2 by clamping device 41, and this clamping device advantageously comprises three pins 10,11,12.Pin 10,11,12 advantageously construct with the form of fixing pin.The handle 3 at rear portion installs throttle lever 6 pivotly.Cutting machine 1 has the chopping disk 96 as instrument, and this chopping disk covers with protective cover 97 in a part for its circumference.Protective cover 97 is fixed on bracket 7.
As shown in Figure 2, CD-ROM drive motor 15 is arranged in shell 2, and this CD-ROM drive motor is internal combustion engine in the present embodiment.The four-stroke engine of CD-ROM drive motor 15 advantageously two stroke engine or mixed lubrication.CD-ROM drive motor 15 has cylinder 18, and piston 17 can reciprocally be installed in the cylinder.Piston 17 driving crank 16 rotates.On bent axle 16 with its anti-rotation be fixed with blast fan 14.The relative side of CD-ROM drive motor 15 is furnished with centrifugal clutch 19, by this clutch, bent axle 16 is connected with the driving-disc 20 of a leather belt driving mechanism.Belt 21 is guided by driving-disc 20.In order to start CD-ROM drive motor 15, be provided with starting device 13, it has the starting handle 5 in the drawings shown in 1.Starting device 13 makes driving-disc 20 rotate and by centrifugal clutch 19, bent axle 16 is rotated.Driving-disc 20 is arranged in the region of a case member 25 and on outer side and covers in a case member of cover plate 8 and starting device 13.
As shown in Figure 3, belt 21 is guided by driving-disc 20 and clutch plate 22.Clutch plate 22 is arranged on the end that bracket 7 and shell 2 deviate from.Clutch plate 22 drives a power transmission shaft do not illustrated, this power transmission shaft is fixed chopping disk 96.Driving-disc 20 can install rotatably around rotating shaft 23 and clutch plate 22 can be installed rotatably around rotating shaft 24.
As shown in Figure 3, bracket 7 has three elongated holes 28 distributed in the longitudinal direction of bracket 7, and pin 10,11,12 are protruded by this elongated hole.Bracket 7 can vertically move relative to case member 25 unclamping in clamping device 41 situation thus.When bracket 7 is by two part structures, case member 25 also can be portion's section of bracket 7.Pin 10,11,12 advantageously screws, it is screwed in the screwed hole of case member 25.But pin 10,11,12 also can be the bolt be fixedly connected with case member 25, and nut that this bolt is screwed on is with analog bracket 7.Belt 21 is configured to elastic belt.Elastic belt has high elasticity and internal stress, thus they need not be strained again.Elastic belt 21 applies a power in the direction of arrow 30 and on driving-disc 22, applies the power on arrow 31 direction on driving-disc 20, thus two belt pulleys are strained mutually by belt 21.
Cutting machine 1 has clamping device 40, utilizes this clamping device can regulate the distance of driving-disc 20 and clutch plate 22.Figure 3 illustrates clamping device 40 on clamped position 38, this position has distance a between the rotating shaft 23 of driving-disc 20 and the rotating shaft 24 of clutch plate 22.Clamping device 40 comprises eccentric cam 32, and it can be pivotally mounted on pin 12 around pivot 34.Eccentric cam 32 is rotatably fixed on case member 25 thus.The pin 33 be fixed on bracket 7 leans on the outer peripheral face of eccentric cam 32.Due to the own tension of belt 21, bracket 7 is pressed on eccentric cam 32 by pin 33 top.
Also can specify, clamping device 41 only has two pins 10,11 being configured to fixing pin.3rd pin 12 is not fixing pin structure, but supporting pin, it is particularly useful for supporting eccentric cam 32.
In the clamped position 38 shown in Fig. 3, pin 33 leans in the recess 35 on the outer peripheral face of eccentric cam 32.Eccentric cam 32 has substantially circular outer peripheral face, and this outer peripheral face has concavely opened breach in the region of recess 35.Recess 35 also can scabble structure.Owing to there is recess 35, the distance when eccentric cam 32 rotates between the instantaneous supporting-point of pin 33 and pivot 34 does not produce continuous print and increases.Until the edge of recess 35, this Distance geometry therefore for rotate eccentric cam 32 power be increase, then to reduce in this recess.Thus achieve an overstress limited when pin 33 leans on the edge of recess 35 and a position location limited on the position of eccentric cam 32, on this position of eccentric cam 32, pin 33 leans in recess 35 to be had on the position of minimum range between pivot 34.
On clamped position 38, this clamped position is a position location of eccentric cam 32, and pin 33 leans on first strong point 36 circumferentially of eccentric cam 32, has distance c between first strong point and pivot 34.Clamping device 41 must be first unclamped in order to regulate clamping device 40.Then bracket 7 can move relative to case member 25 on the direction of double-head arrow 29.From clamped position 38 shown in Figure 3, eccentric cam 32 can rotate in two rotational directions, namely in figure 3 or to the right or turn left.Now start to be increase due to the distance between pivot 34 and the outer peripheral face of eccentric cam 32, therefore must apply the power increased, move out from clamped position 38 shown in Figure 3 to make eccentric cam 32.Eccentric cam 32 is remained on clamped position 38 by belt 21 thus.Rotated in the region of the circular structure of the outer peripheral face reaching eccentric cam 32 by operator at eccentric cam 32 once pin 33, the distance between the strong point and pivot 34 just reduces.Eccentric cam 32 is turned to released position 39 shown in Figure 4 by belt 21.
On released position 39, pin 33 leans second strong point 37 on the outer peripheral face of eccentric cam 32.Have distance d between the strong point 37 and pivot 34, this distance is significantly less than the distance c on clamped position 38.Distance d is the minimum range between pivot 34 and pin 33 in an embodiment.
In the diagram, belt 21 makes bracket 7 move upward towards the side of case member 25.Distance between the rotating shaft 23 of driving-disc 20 and the rotating shaft 24 of clutch plate 22 is reduced to distance b.Due at two belt pulleys 20, the less distance b between 22, the belt tension in belt 21 also reduces, thus on released position 39 shown in Figure 4, belt 21 can disassemble and install new belt 21 with comparalive ease.After having installed new belt 21, eccentric cam 32 has been turned to clamped position 38 shown in Figure 3 again by operator.Eccentric cam 32 now can advantageously construct with knob 9 shown in Figure 1 integratedly, thus handles clamping device 40 and do not need the parts that add.This is represented by dashed line in the diagram.
Fig. 5 and 6 shows an embodiment of eccentric cam 42, and its use can replace eccentric cam 32.Eccentric cam 42 has substantially circular outer peripheral face, and this outer peripheral face has recess 44,45 on mutually relative side.Clamped position shown in Figure 5 38 times, pin 33 is arranged on first strong point 46 in the first recess 44, has ultimate range c between this first strong point and pivot 34.39 times, released position shown in Figure 6, pin 33 is arranged on second strong point 47 of the recess 45 being arranged in relative side.Between second strong point 47 and pivot 34, there is minimum range d.By the strong point 46 and 47 is arranged in recess 44, in 45, the anchor point of clamping device 40 is limited on these two positions 38 and 39.On released position 39, under belt 21 also still can be in little tensile force, thus clamping device 40 also remains on released position 39 due to the power effect of belt 21.
Additionally illustrate the 3rd recess 71 in figure 6, it limits another clamped position.In recess 71, pin 33 leans on the strong point 77, has distance i between this strong point and pivot 34.Distance i different from distance d and and this distance d can be greater than or less than.Due to different distance d, i, can realize multiple clamped position, on these clamped positions, belt 21 is by tensioning to some extent.Thus can in a straightforward manner by selecting the suitable position of eccentric cam 42 to carry out adjusting tensioning force of belt.Other recess advantageously can be set on eccentric cam 42, which define other the clamped position with different belt tensions, thus can adjusting tensioning force of belt well.
Fig. 7 and 8 shows another embodiment of eccentric cam 52.Eccentric cam 52 has mid point 53, arranges between this mid point and pivot 34 with eccentric distance e.Eccentric cam 52 comprises first section 48 with the first radius f and second section 51 with the second radius g.Second radius g is now greater than the first radius f.Two portion's sections 48 and 51 are relatively arranged mutually.Each layout recess 54,55 between portion's section 48 and 51, it limits a position location of eccentric cam 52.Other recess can be set in portion's section 48 for other position location.
On clamped position 38 shown in Figure 7, pin 33 is arranged on first strong point 56 in the first recess 54.Between the strong point 56 and pivot 34, there is distance c.On the region adjacent with second section 51, the first backstop 58 is adjacently arranged with recess 54.Eccentric cam 52 only to rotate on the direction of arrow 98 thus.In this rotation direction, pin 33 leans in first section 48.Advantageously can arrange backstop 58 in this wise, pin 33 is leaned in the first backstop 58 when being arranged on first strong point 56.Backstop 58 limits position location thus and forms an end stop, and this end stop stops eccentric cam to be rotated further against the direction of arrow 98.
On released position 39 shown in Figure 8, pin 33 is arranged on the strong point 57 in recess 55.Recess 55 be substantially now scabble structure and only recessed very minutely relative to first section 48.On released position 39, have distance d between pin 33 and pivot 34, this distance is significantly less than distance c.Also adjacently backstop 59 is arranged in recess 55 recess 55 with on the side faced by second section 51.Eccentric cam 52 only to rotate out on the direction of arrow 99 from released position 39 thus.When rotating in the reverse direction, pin 33 leans in backstop 59, and being rotated further of another eccentric cam 52 is impossible or only just possible in the power situation using super large.The direction of rotation of eccentric cam 52 structurally can be set in a straightforward manner definitely by backstop 58 and 59.In the case, eccentric cam 52 can be adjusted on released position 39 in a first rotational direction and be adjusted in the reverse direction on clamped position 38.
Fig. 9 and 10 shows the embodiment of clamping device 60.Also case member 25 and bracket 7 is shown in fig .9.In the embodiment of Fig. 9, on the side deviated from clutch plate 22 that pin 12 is arranged in driving-disc 20.Bracket 7 is unitary constructions and has opening 26 in the region of driving-disc 20, is stretched out the power transmission shaft for driving-disc 20 do not illustrated in fig .9 by this opening.Bracket 7 has two gathering sills 27, guides belt 21 in this gathering sill.The accommodation section 49 of clamping device 60 is configured between two gathering sills 27.Clamping device 60 comprises adjusting knob 61 and control stick 62, and the latter is pivotally mounted in the fixing ear 67 of adjusting knob 61 with the second end 69.Control stick 62 is pivotally mounted on the pin 64 of case member 25 with its relative first end 68.Pin 64 is protruded by the breach 43 being configured to large elongated hole.Pin 64 also installs control stick 62 pivotally.
Fig. 9 shows the clamping device 60 on clamped position 38.On this position, fixing ear 67 leans in backstop 63, and this backstop is formed by the wall 50 limiting accommodation section 49.Be positioned at the top of line 66 in the second end 69 view in fig .9, this line makes the first end 68 be connected with the rotating shaft 65 of adjusting knob 61.Belt 21 is pressed on pin 64 because the first end 68 pushes up by its intrinsic elasticity on the direction of the rotating shaft 65 of adjusting knob 61.Fix ear 67 to be thus pressed in backstop 63 by top.Fixing ear 67 be now arranged in rotating shaft 65 with on the side faced by pin 64.Clamping device 60 is maintained on clamped position 38 by the internal stress of the belt 21 implemented as elastic belt thus.On clamped position 38, the rotating shaft 23 and 24 of driving-disc 20 and clutch plate 22 has distance a each other.
Figure 10 shows clamping device 60 on released position 39.On this position, rotating shaft 23 and 24 has distance b each other, and this distance is less than distance a.Belt 21 is pines and can dismantles in a straightforward manner or install thus.On released position 39, adjusting knob 61 is rotated relative to clamped position 38 in the counterclockwise direction by around rotating shaft 65.Fixing ear 67 is arranged in the below of line 66, is namely positioned on the relative side of line 66.This position is fixed ear 67 can turn on the height of rotating shaft 65, thus fixing ear 67 looks up than the distance leaving pin 64 further and formation one is less between rotating shaft 23 and 24 on clamped position 38 the vertical of bracket 7 always.As Fig. 9 and 10 illustrates, when bracket 7 moves in its longitudinal direction, pin 10,11 and 12 moves in elongated hole 28.On released position 38, fixed bar 62 compares on clamped position 39 more towards the fore-and-aft tilt of bracket 7.
Chopping disk 96 shown in Figure 1 is arranged on bracket 7.Chopping disk 96 be now arranged in as shown in FIG. 1 in the usual manner the inside of bracket 7 with on the side faced by shell 2.In order to cutting can be being implemented near side border place, on the side deviated from shell 2 that chopping disk 96 also can be arranged in the outside of bracket 7.For this reason by whole bracket 7 vertical axes 180 ° around it together with chopping disk 96.The hold-down nut unclamping pin 10,11 and 12 for this reason or be arranged on pin 10,11 and 12.Then clamping device 60 is made to be adjusted on released position 39.The bracket 7 that then can unclamp belt 21 and take off from case member 25 with belt 21, clutch plate 22 and chopping disk 96 and make bracket 7 in this wise around its vertical axes, make bracket 7 be positioned in figures 9 and 10 above, the side that deviates from case member 25 leans on case member 25.Clamping device 60 is now also rotated together with bracket 7.Next be arranged on driving-disc 20 by belt 21 again, clamping device 60 is adjusted to clamped position 38 and pin 10,11 and 12 or corresponding hold-down nut and is tightened up, thus bracket 7 remains on case member 25 regularly.The rotation of bracket 7 can be realized in a straightforward manner by the structure of clamping device 60.This correspondingly can realize at the clamping device 40,60,70,80 of all descriptions.
In the embodiment of the clamping device 70 shown in Figure 11 and 12, be also provided with adjusting knob 61, it is installed pivotally around rotating shaft 65.Control stick 72 is pivotally mounted on this adjusting knob 61 with the second end 69.Another end and the first end 68 of control stick 72 are pivotally mounted on the fixing ear 75 of push rod 73.Push rod 73 acts on the pin 64 on case member 25.Push rod 73 has the guiding area 74 that diameter increases, and guides between the wall 50 that this guiding area extends in the longitudinal direction of accommodation section 49 on bracket 7.
Clamped position 38 in the drawings shown in 11, on this clamped position, rotating shaft 23 and 24 has distance a each other, and fixing ear 67 is bearing on the first side of the line 76 between first end 68 and rotating shaft 65 with the second end 69 of control stick 72.Advantageously, fixing ear 67 leans in one drawing in 11 backstops do not illustrated on this position.
On released position 39 shown in Figure 12, the second end 69 with fixing ear 67 be bearing in be arranged in opposite, to be at the view of Figure 12 on the position that represents below line 76.On the height that fixing ear 67 is approximately positioned at rotating shaft 65 on released position 39 or on the side deviated from first end 68 being positioned at rotating shaft 65.On clamped position 38 shown in Figure 11, fixing ear 67 is located between rotating shaft 65 and first end 68 relative to line 76.When being less than on clamped position 38 when the distance thus between first end 68 and rotating shaft 65 is on released position 39.The distance diminished causes, and bracket 7 moves towards driving-disc 20 by the belt 21 do not illustrated in fig. 12 together with clutch plate 22.Belt pulley 20 and 22 does not illustrate in figs. 11 and 12.
Clamping device 80 is provided with in the embodiment shown in Figure 13 and 14.Clamping device 80 has adjusting knob 81, it is formed with eccentric cam 82.Adjusting knob 81 can be pivotally mounted on bracket 7 around rotating shaft 85.Push rod 83 is arranged on the pin 64 of case member 25, and this push rod has the guiding area 84 that diameter increases.Guiding area 84 guides with longitudinal movement in guiding mechanism 86.Guiding mechanism 86 such as can be configured to the sleeve in the accommodation section 49 of bracket 7.Eccentric cam 82 act on push rod 83 with on the end face faced by eccentric cam 82, this edge face structure is on guiding area 84.Figure 13 shows clamping device 80 and is positioned at a centre position 88.When adjusting knob 81 continues motion in fig. 13 in the clockwise direction, eccentric cam 82 enters into the state leaned with the wall 50 of accommodation section 49, and this accommodation section is formed backstop 87.Then clamping device 80 is positioned on clamped position.On centre position 88 shown in Figure 13, rotating shaft 23 and 24 has distance h each other, and but this distance is less than the distance a on clamped position 38 is greater than the distance b on released position 39 shown in Figure 14.
As shown in figure 14, eccentric cam 82 leans on guiding area 84 with a region on this position, has very little distance between this region and rotating shaft 85.When eccentric cam 82 rotates out from released position 39 shown in Figure 14 in the clockwise direction, distance between the circumference of eccentric cam 82 and rotating shaft 85 increases continuously, thus push rod 83 is left rotating shaft 85 by the tensile force top pressure of the belt 21 do not illustrated against Figure 13 and 14.Belt 21 is tensioned thus.On clamped position 39, eccentric cam 82 leans in this wise on push rod 83, makes belt 21 on eccentric cam 82, apply one relative to rotating shaft 85 in the clockwise direction, the moment of torsion namely on the direction of clamped position 39.Clamping device 80 is maintained on this position due to the effect of the power of belt 21 thus.The power that must counterclockwise go up and overcome elastic belt 21 in order to unclamp clamping device 80 rotates adjusting knob 81, until first it arrive centre position 88 shown in Figure 13 and then arrive released position 39 shown in Figure 14.
Reference numeral identical in all the drawings represents mutually corresponding element.
Claims (22)
1. work implement, comprise the instrument driven by CD-ROM drive motor (15), this instrument is driven by belt (21), belt (21) is guided by driving-disc (20) and clutch plate (22), wherein be provided with the clamping device (40 for this belt (21), 60, 70, 80), the distance between driving-disc (20) and clutch plate (22) can be changed by this clamping device, wherein clamping device (40, 60, 70, 80) there are at least one clamped position (38) and at least one released position (39), wherein driving-disc (20) and clutch plate (22) have the first distance (a) each other and have less second distance (b) on released position (39) on clamped position (38), it is characterized in that, this belt (21) is elastic belt and this clamping device (40, 60, 70, 80) because the effect of the tensile force of elastic belt is maintained on clamped position (38), and in order to unclamp clamping device (40, 60, 70, 80), the power that must overcome elastic belt rotates clamping device (40, 60, 70, 80) regulating element.
2. according to work implement according to claim 1, it is characterized in that, this instrument is arranged on a bracket (7).
3. according to work implement according to claim 2, it is characterized in that, at least one section (7) of bracket is arranged with longitudinal movement relative to the shell (2) of work implement, on shell (2), wherein arranges driving-disc (20) and arrange clutch plate (22) in portion's section (7) of bracket.
4. according to work implement according to claim 3, it is characterized in that, clamping device (40,60,70,80) have a clamping element, this clamping element is applied on a pressure elements, and one wherein in these two elements of clamping element and pressure elements to be connected with shell (2) and another is connected with mobilizable the section (7) of bracket.
5. according to work implement according to claim 4, it is characterized in that, clamping element is the eccentric cam (32,42,52,82) installed prejudicially and rotatably.
6. according to work implement according to claim 5, it is characterized in that, eccentric cam (32,42,52,82) be arranged on the pin (12) of a clamping device (41) of clamping device (40), wherein pin (12) is configured to fixing pin.
7. according to work implement according to claim 5, it is characterized in that, eccentric cam (32,42,52,82) is arranged on and is permanently connected with shell (2), supporting on the pin (12) of the formal construction of pin.
8. according to work implement according to claim 5, it is characterized in that, eccentric cam (32,42,52,82) there is at least one recess (35,44,45,54,55,71), on a position of clamping element, pressure elements leans in this recess.
9. according to work implement according to claim 5, it is characterized in that, eccentric cam (52) has at least one backstop (58,59), the rotational motion of this backstop restriction eccentric cam (52).
10. according to work implement according to claim 5, it is characterized in that, eccentric cam (82) is applied on pressure elements by a push rod (83), and wherein this push rod (83) guides with longitudinal movement in a guiding mechanism (86).
11. according to work implement according to claim 5, it is characterized in that, clamping element is by control stick (62,72) be applied on pressure elements, wherein this control stick (62,72) is above connected with pressure elements at first end (68) and is above connected with clamping element at the second end (69).
12., according to work implement according to claim 11, is characterized in that, control stick (62,72) is installed pivotly on two end (68,69).
13. according to work implement according to claim 11, it is characterized in that, control stick (62,72) the second end (69) is arranged in a line (66 on clamped position (38), 76) on the first side, wherein this line (66,76) control stick (62 is made, 72) first end (68) is connected with the rotating shaft (65) of clamping element, with be arranged on released position (39) on the second relative side of this line (66,76).
14., according to work implement according to claim 4, is characterized in that, be provided with the backstop (63,87) for clamping element, clamping element leans in this backstop on clamped position (38).
15. according to work implement according to claim 14, it is characterized in that, clamping device (60,80) accommodation section (49) being arranged in bracket (7) is neutralized described backstop (63,87) and is formed by the wall (50) of accommodation section (49).
16., according to work implement according to claim 1, is characterized in that, clamping device (40,60,70,80) is arranged in an accommodation section (49) in the strap lug of belt (21).
17., according to work implement according to claim 1, is characterized in that, the regulating element of clamping device (40,60,70,80) is with the formal construction of rotatable adjusting knob (61,81).
18., according to work implement according to claim 17, is characterized in that, clamping element is configured on adjusting knob (61,81).
19., according to work implement according to claim 3, is characterized in that, work implement has clamping device (41), and moveable portion section (7) of bracket locks relative to shell (2) by this clamping device.
20., according to work implement according to claim 19, is characterized in that, clamping device (41) has at least one and is arranged in pin (10,11,12) in elongated hole (28).
21., according to work implement according to claim 17, is characterized in that, in order to unclamp clamping device (40,60,70,80), counter clockwise direction must rotate regulating element.
22., according to work implement according to claim 1, is characterized in that, described belt (21) is lax and just can be disassembled and installs with comparalive ease on described released position (39).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008023927.5 | 2008-05-16 | ||
| DE102008023927A DE102008023927A1 (en) | 2008-05-16 | 2008-05-16 | implement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101579756A CN101579756A (en) | 2009-11-18 |
| CN101579756B true CN101579756B (en) | 2015-08-26 |
Family
ID=40833806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910139089.9A Active CN101579756B (en) | 2008-05-16 | 2009-05-15 | Work implement |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8668027B2 (en) |
| CN (1) | CN101579756B (en) |
| DE (1) | DE102008023927A1 (en) |
| GB (1) | GB2459964B (en) |
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| DE202009009145U1 (en) * | 2009-07-15 | 2010-12-16 | Makita Corp., Anjo | belt drive |
| US9333571B2 (en) * | 2009-12-16 | 2016-05-10 | Husqvarna Ab | Tool unit and tool for a cutting or sawing machine |
| DE202010004413U1 (en) | 2010-03-31 | 2011-08-11 | Makita Corporation | Working device with improved arrangement of a belt |
| DE202011000143U1 (en) | 2011-01-20 | 2012-06-08 | Makita Corporation | Engine tool with a belt tensioner |
| DE202011050985U1 (en) | 2011-08-15 | 2012-11-23 | Makita Corporation | Engine tool with a belt tensioner |
| EP2478984B1 (en) | 2011-01-20 | 2015-03-25 | Makita Corporation | Motorised work device with a tensioning device for a belt |
| DE102011110422A1 (en) * | 2011-08-03 | 2013-02-07 | Sew-Eurodrive Gmbh & Co. Kg | Spindle motor has synchronous belt drive portion that is provided to drive pulley through which spindle is driven by clutch, and pulley that is supported over bearing which is mounted on secondary housing portion |
| US9132521B2 (en) * | 2012-04-11 | 2015-09-15 | Kingsand Machinery Ltd. | Main shaft structure of tool machine |
| DE202012103489U1 (en) | 2012-09-13 | 2013-12-19 | Makita Corp. | Belt drive for a motorized tool |
| DE102013012746A1 (en) * | 2013-07-31 | 2015-02-05 | Andreas Stihl Ag & Co. Kg | Hand-held implement |
| AU2014414861B2 (en) * | 2014-12-22 | 2017-11-30 | Husqvarna Ab | Transmission belt adjustment for a power cutter |
| SE541380C2 (en) * | 2017-05-03 | 2019-09-10 | Husqvarna Ab | Power tool comprising a draining channel |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101579756A (en) | 2009-11-18 |
| GB2459964A (en) | 2009-11-18 |
| US20090283286A1 (en) | 2009-11-19 |
| GB0908074D0 (en) | 2009-06-24 |
| US8668027B2 (en) | 2014-03-11 |
| GB2459964B (en) | 2010-08-04 |
| DE102008023927A1 (en) | 2009-11-19 |
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